Solardirects Specifications:
Solar testing in NZ has proven our systems are
among the top performers.
Tubes- 10 year warranty*
Proven 82 % collection efficiency
Durable stainless steel cover and frame
Heavy wall manifold thickness 1.8mm (check this against the opposition)
Quality rockwool insulation
3 speed wilo bronze pump.
Can be used with high or low pressure systems/max 8 bar/116psi
Tubes-AL/N/AL absorber coating,aluminium nitride layers-250 deg c
Insulation properties of the solar tubes are so good-inner temperatures
can be 250 deg c while the outside remains cool to touch- this is why
they operate so well in colder temperatures.
Maximum tank operating temperature of 70 degs c is ideal for a retro fit
system.This temperature should be checked annually because of climate
change.
The links below refer to kitset sizes on kitset page.
You need to know:
1. Tube output,systems we have seen for sale are as low as 170deg c
(stagnation).
2. Insulation qualities.
3. Collection efficiency percentage.
4. Orientation is important but not as important as some will have you believe.
5. If you purchase a system that has a tank on the roof you will have additional
structural costs to support the weight.
6. Distance between pump and collector.(the closer the better) test results are
based on 10 meters
7. Do you fit a 2 or 3 sensor controller.
8. Powder coated collector covers wont last as long as stainless
9. How many people the collector will support.
copyright 2010
* conditions apply
